Bug: Client crash on logout.

Symptoms: Client crashes with "Client.exe has stopped working" upon logging out from game (when pressing escape key).

How to reproduce: Seems to happen when character has been logged in longer than about 30 to 60 minutes. Sometimes it doesn't crash, but for the most part it does.

Workaround: None.

Logs / screen shots: DxDiag file can be downloaded here. Process dump file can be downloaded here.

Code:
Problem signature:
  Problem Event Name:	APPCRASH
  Application Name:	Client.exe
  Application Version:	0.0.0.0
  Application Timestamp:	50ba4276
  Fault Module Name:	StackHash_799d
  Fault Module Version:	6.1.7601.17725
  Fault Module Timestamp:	4ec49b8f
  Exception Code:	c0000374
  Exception Offset:	000ce6c3
  OS Version:	6.1.7601.2.1.0.256.1
  Locale ID:	1053
  Additional Information 1:	799d
  Additional Information 2:	799dfa507eac724159e27a3789275f5a
  Additional Information 3:	94bf
  Additional Information 4:	94bf21b900fd7624f30841679ac4c114